器件名称: AD7440BRM-REEL7
功能描述: Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23
文件大小: 771.91KB 共28页
简 介:Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23 AD7440/AD7450A
FEATURES
Fast throughput rate: 1 MSPS Specified for VDD of 3 V and 5 V Low power at max throughput rate: 4 mW max at 1 MSPS with 3 V supplies 9.25 mW max at 1 MSPS with 5 V supplies Fully differential analog input Wide input bandwidth: 70 dB SINAD at 100 kHz input frequency Flexible power/serial clock speed management No pipeline delays High speed serial interface: SPI/QSPI/MICROWIRE/DSP compatible Power-down mode: 1 A max 8-lead SOT-23 and MSOP packages
FUNCTIONAL BLOCK DIAGRAM
VDD
VIN+ T/H VIN– VREF
12-BIT SUCCESSIVE APPROXIMATION ADC
SCLK
AD7440/AD7450A
SDATA CONTROL LOGIC CS
03051-A-001
GND
APPLICATIONS
Transducer interface Battery-powered systems Data acquisition systems Portable instrumentation Motor control
Figure 1.
on the falling edge of CS; the conversion is also initiated at this point. The SAR architecture of these parts ensures that there are no pipeline delays. The AD7440 and the AD7450A use advanced design techniques to achieve very low power dissipation at high throughput rates.
GENERAL DESCRIPTION
The AD7440/AD7450A1 are 10-bit and 12-bit high speed, low power, successive approximation (SAR) analog-to-digital converters with a fully differential analog input. These parts operate from a single 3 V or 5 V power supply and use advanced design techniques to achieve very low power dissipation at throughput rates up to 1 MSPS. The SAR architecture of these parts ensures ……
